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Q.

Which of the following physical quantities have the same dimensions ?

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a

Electric displacement D→ and surface charge density

b

Current density and surface charge density

c

Displacement current and electric field

d

Electric potential and energy

answer is A.

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Detailed Solution

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Electric displacement

D→=∈0E→[D]=∈0E=∈0σ∈0[D]=[σ]

σ=Surface change density 

So, Electric displacement and Surface charge density has same units.

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